How To: Avoid Common OTDR Test Problems 

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Pulse width is too big. If your pulse is at 30ns then your pulse will be 3 metres long, any events in that area will be shown as just one event and not individual events.

You should check the threshold setting maybe the values very big and your events less from theses values so will not appear in table

@@DKy0 thanks

@@BekoIQ thanks

Optical Time Domain Reflectometer (OTDR)

It shouldn't make any difference the housings are identical it's the end faces that are different

Ha just noticed you got it wrong too. It's a UPC connector plugged into an APC coupler 🤣 However, it still doesn't matter 😁

It will cause high loss than the normal, And in our field it is fital mistake but for you no worries do what ever you want :)

@@moatazasadek No it won't. You will get a high loss if you try to interface an APC connector with a UPC connector but that's not happening. He's interfacing a UPC fibre to a UPC fibre. The housing makes no difference. If you don't believe me join 2 APC launch leads together using both types of housing and shoot light with your OTDR and no significant loses will be observed then join a UPC and An APC launch lead together and shoot light from your OTDR and you will see loses no matter which housing you use. The only difference between the housings is the colour, all the alignment is done with the fibre face angle.

Ok no problem you look understood the field good and i trust your. Thank you for sharing,